Internal-combustion engine



Filed June 20. 1923 Patented Dec. 25, 1923.

WILLIAM WERRY, or Lo'NDoN, ENGLAND.

INTERNAL-COMBUSTION ENGINE.

Application filed .Tune 20, 1923. SeriaINo. 646,652.

To all tf1/omit may concern.'

Be it known that I, VILLIAM VERRY, a Eritish subject,`and residing at 69 King I'Villiam Street, London, E. C. t, England, have invented certain new and useful Improvements in and Relating to Internal- Combustion Engines, loffwhich the following is a specification. y

rThis invention relates to internal combustion engines of the well-known VVerry type, that is, the type in which independent pistons are employed working in a common lined cylinder kand geared to independent crank shafts which may either be used to drive propellers or other independent members or from which the powermay be taken to a common shaft.

The object of the present invention is to deviseimprovements in the construction and arrangement of internal combustion engines of this type which will render them suitable for use with motor-cycles, motor-cars or other motor-propeller vehicles, vwhile being also applicable for marine work or for stationary work or in general for any purposes for which internal combustion engines may be used. y

The invention consists in an internal combustion engine of the type referred to in which the drive is taken from the crank shafts by means of a chain to a common power shaft so situated in relation to the crank shafts that its axis is external to the line connecting the crank shafts.

The invention also consists in an internal combustion engine of the type referred to in which there is a three-point single chain drive by means of a single chain which passes round sprocket wheels upon the respective crank shafts and around a similar wheel upon a common power shaft located between but out of alignment with the crank shafts, such an arrangement being' particularly suitable for use with motor-cycles.

The invention also consists in other details and arrangements hereinafter described or indicated.

The accompanying drawings illustrate an approved embodiment of the invention Figure l is an elevation of a motor-cycle showing my engine applied thereto.

Figure 2 is a plan with part removed.

In carrying my invention into effect in one convenient manner as, for example, in its application to an internal combustion engine suitable for use with motor-cycles, and as illustrated in .Figures l and 2, I form my improved engine with a common cylin der a in which work two pistons arranged back to back and geared by suitable means to independent crank shafts o, 0, the arrangement so far described conforming to my well-known type above referred to.

Each of the crank shafts is provided with an independent ywheel d of suitable design and dimensions and in order to provide a compact arrangement which may be readily fitted to a motor-cycle frame I arrange the gear-box e centrally between and above the engine cranky shafts with a sprocket wheel f upon the gear-box spindle in the same vertical plane as sprocket wheels g, 7L upon the respective crank shafts, the latter being so arranged that they rotate in the same direction. ,The arrangement is such that a single chain z' may be made to pass round all three sprocket wheels and there is thus a three-point single chain drive from the independent crank shafts to the gear-bor; spindle, the gear-box being fitted as as usual with a belt pulley or sprocket wheel which is coupled vto the back wheel of the motorcycle by the usual belt or chain.

The common power shaft is so positioned in relation to the crank shafts that its axis is external to the linefconnecting the crank shafts so that adjustment of the chain may be effected without interfering with the crank shafts.

It will, of course, be understood that my invention isnot to be confined to any particular number of cylinders with twin pistons therein which may be employed in connection with each engine and I may-modify the form and arrangement of the engine and the manner of disposing of the chain or belt drives according to the particular purpose for which the engine is to be employed or any practical requirements that may have to be fulfilled.

Having now described my invention, what I claim as new and desire to secure by Letters Patent is In an engine structure, parallel engine 4crank shafts, a common power shaft,l

l sprocket wheels on the respective engine shafts and the sprocket wheel on said power shaft, the latter shaft being located between but out of alinement with the engine Crank shafts whereby the tension of the chain may be adjusted without altering the posi- 10 tion of the engine shafts.

In testimony whereof I have signed my name to this specification. Y

` WILLIAM WERRY. 

